General Description, Features | Shure FP23 instruction

Model FP23 User Guide Microphone Preamplifier

General Description

The Shure FP23 is a portable, battery-powered microphone pre- amplifier with phantom power. Designed for high bandwidth 96k/24 digital production, this studio-quality mic preamp is ideal for critical radio, television, and film production applications.

With its rugged mechanical and electrical construction, compact size, and high-quality components, the FP23 is extremely durable and easy to use. This highly reliable mic preamp will provide years of superb audio performance under the most punishing field condi- tions.

Features

Audio performance

•Maximum of 66 dB of gain, adjustable in eleven discrete steps for accurate, repeatable gain settings.

•Dynamic range exceeding 120 dB.

•20 Hz to 50 kHz audio bandwidth.

•High immunity to RF interference due to transformers, RF filtering, and all-metal construction.

•High current line output driver capable of driving very long cable runs.

Transformer balanced

•Premium-quality input transformer provides superior sonic quality and freedom from interference problems.

•Custom-designed output transformer provides line driving ability with freedom from interference problems.

Limiter

•Extended range peak limiter uses dual opto-isolators, making the unit virtually ªunclippable.º

Battery power

•Internal battery power (two AA) for convenient, low cost power.

•Battery life greater than 24 hours.

Durable mechanical construction

•High strength extruded aluminum chassis with protective metal end rails to withstand punishing field conditions.

•Easy access battery compartment for quick battery changes.

Phantom power

•Selectable 48-volt and 12-volt phantom power for condenser microphones.

High pass filter

•Two corner frequency settings.

2000, Shure Incorporated 27A8726 (TI)

Specifications

Gain

0 dB to 66 dB input to output, switch selectable

Gain Accuracy

+0.6, ±0.1 dB with reference to front panel gain markings (150 Ω source, 100k Ω load impedances)

Frequency Response (see graph below)

20 Hz ± 22 kHz, +0.1, ±0.5 dB ±1 dB at 50 kHz

(relative to 1 kHz level with 150 Ω source)

Equivalent Input Noise

±126 dBu (±128 dBV) maximum

(150 Ω source, flat weighting, 22 Hz ± 22 kHz bandwidth for gain settings of 36 dB or greater)

Output Clipping Level

+22 dBu minimum with 100 kΩ load

+20 dBu minimum with 600 Ω load

Input Clipping Level

+4 dBu minimum at the 0 or +18 dB gain setting

Dynamic Range

122 dB minimum at the +18 dB gain setting

THD + Noise

0.05% maximum

(from 50 Hz to 22 kHz @ +4 dBu output level,

22 Hz ± 22 kHz filter bandwidth, +46 dB gain setting)

Common Mode Rejection Ratio:

100 dB minimum at 80 Hz

60 dB minimum at 10 kHz

Input

Transformer-balanced, 2000 Ω input impedance

Output

Transformer-balanced, 130 Ω output impedance

Low Cut

80 Hz or 160 Hz (switch selectable), 6 dB per octave

Phantom Power

12V or 48V (switch selectable) per DIN 45 596

Limiter

Limits to +17 dBu output level 10:1 limiting ratio

5 ms attack time, 100 ms release time Amber/Red LED indicates limiting/clipping

Internal Voltage Rails

+15 V and ±15 V, regulated

Power

2 AA batteries, 24 hours life typical with +4 dBu signal into 600 Ω, no phantom power

Power LED

Green indicates power and good battery.

Red indicates power and low battery. LED turns red when approximately 4 hours of battery life remain.

Polarity

Mic input to line output is non-inverting

Operating Temperature Range

±18 to 57 degrees C 0 to 135 degrees F

Printed in U.S.A.

FP23 specifications

The Shure FP23 is a compact and versatile two-channel portable wireless audio system designed for professionals in the film, television, and broadcast industries. Known for its reliability and high-quality sound, the FP23 is engineered to meet the demands of mobile audio applications.

One of the main features of the FP23 is its dual-channel capability, allowing users to connect and monitor two separate audio sources simultaneously. This is particularly beneficial for filmmakers and videographers who need to capture dialogue from multiple subjects without compromising audio quality. The system operates in the UHF frequency range, which helps to minimize interference and maintain a stable connection even in challenging environments.

Another standout characteristic of the Shure FP23 is its robust transmission technology. It utilizes digital RF transmission, providing improved audio fidelity and minimizing signal dropout. The system also supports multiple frequency bands, enabling users to select the optimal frequency for their specific location, which is crucial for avoiding interference from other wireless devices.

The FP23 features a user-friendly interface, making it easy for operators to adjust settings quickly. The LCD screen displays essential information such as battery life, signal strength, and frequency settings, which allows users to monitor the device's performance in real-time. Additionally, the system comes equipped with Shure’s advanced automatic frequency selection technology, which scans for the clearest frequencies available and simplifies setup.

In terms of power, the FP23 operates on AA batteries, offering extended battery life for long recording sessions. The system also includes a locking connector for secure microphone attachment, ensuring reliability during dynamic shoots.

Durability is another important aspect of the Shure FP23. Its rugged construction is designed to withstand the rigors of field use, providing peace of mind to professionals who demand a dependable audio solution in various environments.

Overall, the Shure FP23 stands out as an exceptional portable wireless audio system, combining ease of use, reliable performance, and high-quality sound. Whether for on-location shoots, interviews, or live events, it serves as an invaluable tool for audio professionals seeking to deliver clear and accurate sound reproduction.